I loved my experience at Suchada's apartment: it’s a serviced apartment, so it’s cleaned every few days, and there are plenty of amenities (e.g. a tuk tuk service to the station, a food delivery menu, lots of bottled water). It’s incredibly comfortable, and comes with two A/Cs to make sure it stays cool in the hot weather. There are also staff on hand who are incredibly friendly and helpful. Suchada's instructions for how to get to the apartment were really clear too, and the communication before and during my trip was excellent.
The apartment is a few minutes from the BTS station, so it’s well-connected. It’s a four stations from Siam, so it’s a short journey, and there are plenty of other attractions that can be accessed via the BTS too. There’s a 7/11 next to the station too, so this was really convenient.
I really do recommend Suchada's to anyone looking for a place to stay in Bangkok: it’s excellent value for money, and you will not regret it!